signal: introduce retarget_shared_pending()
No functional changes. Move the notify-other-threads code from exit_signals()
to the new helper, retarget_shared_pending().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Matt Fleming <matt.fleming@linux.intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
diff --git a/kernel/signal.c b/kernel/signal.c
index c15e979..5341e21 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2198,10 +2198,25 @@
return signr;
}
+/*
+ * It could be that complete_signal() picked us to notify about the
+ * group-wide signal. Another thread should be notified now to take
+ * the signal since we will not.
+ */
+static void retarget_shared_pending(struct task_struct *tsk)
+{
+ struct task_struct *t;
+
+ t = tsk;
+ while_each_thread(tsk, t) {
+ if (!signal_pending(t) && !(t->flags & PF_EXITING))
+ recalc_sigpending_and_wake(t);
+ }
+}
+
void exit_signals(struct task_struct *tsk)
{
int group_stop = 0;
- struct task_struct *t;
if (thread_group_empty(tsk) || signal_group_exit(tsk->signal)) {
tsk->flags |= PF_EXITING;
@@ -2217,14 +2232,7 @@
if (!signal_pending(tsk))
goto out;
- /*
- * It could be that __group_complete_signal() choose us to
- * notify about group-wide signal. Another thread should be
- * woken now to take the signal since we will not.
- */
- for (t = tsk; (t = next_thread(t)) != tsk; )
- if (!signal_pending(t) && !(t->flags & PF_EXITING))
- recalc_sigpending_and_wake(t);
+ retarget_shared_pending(tsk);
if (unlikely(tsk->group_stop & GROUP_STOP_PENDING) &&
task_participate_group_stop(tsk))
